An dochasac writes: Earth Hour's simple suggestion to turn off your lights for one hour on Saturday March 23rd has grown into an international social movement powerful enough to have become controversial. Writing for Slate Magazine, Bjørn Lomborg argued that it is a waste of time and energy. Thankfully it is still legal to do something that at the very least gives us a better view of a starry night sky, of comet Panstarrs and of our own potential to change the world. Here is why Earth Hour still matters.